JCV Gantt Pro2 creates a Gantt from the MindManager map. There are other solutions (check MindManager website) but JCV Gantt has the big advantage to be sync in real time with MM. Meaning you can have the same project open both in mind map and gantt views on 2 screens, a change on either form is immediately seen on the other. I find it very useful.
Practically the WBS is best created in MM, transformed into a gantt with JCV Gantt, then scheduled using both programs in order to finalize the plan efficiently.
Happy project management!
Ericlodi
http://web.mac.com/ericlodi/iWeb/Orgameth/